<div class="noise"></div>
<div class="overlay"></div>
<div class="terminal">
    <h1>Error <span class="errorcode">404</span></h1>
    <p class="output">The page you are looking for might have been removed, had its name changed or is temporarily unavailable.</p>
    <p class="output">Please try to <a href="#1">go back</a> or <a href="#2">return to the homepage</a>.</p>
    <p class="output">Good luck.</p>
</div>

<style>
    @import 'https://fonts.googleapis.com/css?family=Inconsolata';

    html {
        min-height: 100%;
    }

    body {
        box-sizing: border-box;
        height: 100%;
        background-color: #000000;
        background-image: radial-gradient(#11581E, #041607), url("https://media.giphy.com/media/oEI9uBYSzLpBK/giphy.gif");
        background-repeat: no-repeat;
        background-size: cover;
        font-family: 'Inconsolata', Helvetica, sans-serif;
        font-size: 1.5rem;
        color: rgba(128, 255, 128, 0.8);
        text-shadow:
                0 0 1ex rgba(51, 255, 51, 1),
                0 0 2px rgba(255, 255, 255, 0.8);
    }

    .noise {
        pointer-events: none;
        position: absolute;
        width: 100%;
        height: 100%;
        background-image: url("https://media.giphy.com/media/oEI9uBYSzLpBK/giphy.gif");
        background-repeat: no-repeat;
        background-size: cover;
        z-index: -1;
        opacity: .02;
    }

    .overlay {
        pointer-events: none;
        position: absolute;
        width: 100%;
        height: 100%;
        background:
                repeating-linear-gradient(
                        180deg,
                        rgba(0, 0, 0, 0) 0,
                        rgba(0, 0, 0, 0.3) 50%,
                        rgba(0, 0, 0, 0) 100%);
        background-size: auto 4px;
        z-index: 1;
    }

    .overlay::before {
        content: "";
        pointer-events: none;
        position: absolute;
        display: block;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100%;
        background-image: linear-gradient(
                0deg,
                transparent 0%,
                rgba(32, 128, 32, 0.2) 2%,
                rgba(32, 128, 32, 0.8) 3%,
                rgba(32, 128, 32, 0.2) 3%,
                transparent 100%);
        background-repeat: no-repeat;
        animation: scan 7.5s linear 0s infinite;
    }

    @keyframes scan {
        0%        { background-position: 0 -100vh; }
        35%, 100% { background-position: 0 100vh; }
    }

    .terminal {
        box-sizing: inherit;
        position: absolute;
        height: 100%;
        width: 1000px;
        max-width: 100%;
        padding: 4rem;
        text-transform: uppercase;
    }

    .output {
        color: rgba(128, 255, 128, 0.8);
        text-shadow:
                0 0 1px rgba(51, 255, 51, 0.4),
                0 0 2px rgba(255, 255, 255, 0.8);
    }

    .output::before {
        content: "> ";
    }

    /*
    .input {
      color: rgba(192, 255, 192, 0.8);
      text-shadow:
          0 0 1px rgba(51, 255, 51, 0.4),
          0 0 2px rgba(255, 255, 255, 0.8);
    }

    .input::before {
      content: "$ ";
    }
    */

    a {
        color: #fff;
        text-decoration: none;
    }

    a::before {
        content: "[";
    }

    a::after {
        content: "]";
    }

    .errorcode {
        color: white;
    }
</style>